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DTC P0102, P0103 MAF SENSOR EC-731 [VG33E] C D E F G H I J K L M A EC 4. CHECK MAF SENSOR POWER SUPPLY CIRCUIT 1. Disconnect mass air flow sensor harness connector. 2. Turn ignition switch ON. 3. Check voltage between terminal 2 and ground with CONSULT-II OK or NG OK >> GO TO 6. NG >> GO TO 5. 5. DETECT MALFUNCTIONING PART Check the following. ● Harness for open or short between ECM relay and mass air flow sensor ● Harness for open or short between mass air flow sensor and ECM >> Repair harness or connectors. 6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between MAF sensor terminal 3 and ECM terminal 55. 4. Also check harness for short to power. OK or NG OK >> GO TO 7. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 7. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between MAF sensor terminal 4 and ECM terminal 54. 2. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 8. NG >> Repair open circuit or short to ground or short to power in harness or connectors. AEC641A Voltage: Battery voltage SEF627W Continuity should exist. Continuity should exist. |